Read Go body bytes with GZIP support

body_reader.go

package main

// License: Apache v2

import (
	"bytes"
	"compress/gzip"
	"io/ioutil"
	"net/http"
)

func readBodyBytes(r *http.Request) ([]byte, error) {
	// Read body
	bodyBytes, readErr := ioutil.ReadAll(r.Body)
	if readErr != nil {
		return nil, readErr
	}
	defer r.Body.Close()

	// GZIP decode
	if len(r.Header["Content-Encoding"]) > 0 && r.Header["Content-Encoding"][0] == "gzip" {
		r, gzErr := gzip.NewReader(ioutil.NopCloser(bytes.NewBuffer(bodyBytes)))
		if gzErr != nil {
			return nil, gzErr
		}
		defer r.Close()

		bb, err2 := ioutil.ReadAll(r)
		if err2 != nil {
			return nil, err2
		}
		return bb, nil
	} else {
		// Not compressed
		return bodyBytes, nil
	}
}